Leading a project to migrate hundreds of screens to SwiftUI/Jetpack Compose from UIKit/AndroidView in Merpay

Merpay just migrated hundreds of payment screens to modern UI frameworks while keeping their app running in production. Here's how they managed a 2-year engineering transformation.

Masamichi Ueta, Engineering Manager at Merpay, shares how they're systematically migrating their entire mobile codebase from UIKit/Android View to SwiftUI/Jetpack Compose. The project started in 2023 and involves cross-functional coordination across multiple product teams.

Key Takeaways

• 65% Android and 60% iOS screens migrated after two years of execution
• Created detailed screen inventory with IDs and 7-stage progress tracking system
• Bi-weekly cross-team meetings coordinate mobile engineers and designers across all programs
• Balanced migration timing between standalone updates and new feature development
• Leveraged Engineering Projects framework to secure long-term investment commitment

The article reveals their specific spreadsheet structure and status categories that made transparent progress reporting possible across the entire organization.